摘要
通过对无互联线逆变器并联系统小信号模型的分析可知:在并联系统中,传统的功率计算和频率调节方法存在着不利于系统稳定的因素,即功率检测的等效滤波器时间常数τ。为了提高逆变器无线并联系统的稳定性,以两台单相逆变器无互联线并联系统为研究对象,提出利用数字芯片存储前一工频周期的电压和电流值减小功率检测的滤波器时间常数τ和提高频率调节分辨率的控制运算方案。实验结果证明该控制方法取得了很好的效果。
In the inverter parallel system based on droop scheme, the time （τ） of the conventional power measurement can reduce the stability of the system after detailed analyzing the small-signal model of the parallel system. In order to improve the stability of the parallel system, the time of power measurement should be reduced. Two paralleled single-phase inverter system with droop control scheme as the research object is used in the paper, and that using digital chip to memorize a periodic sampling-data of the output voltage and current of the single inverter is brought forword, which can calculate the active power and reactive power of a single inverter and reduce the time of power measurement. The experimental results show that the proposed control scheme can not only achieve good dynamic performance but also improve system stability.
出处
《电工技术学报》
EI
CSCD
北大核心
2007年第3期85-90,共6页
Transactions of China Electrotechnical Society
关键词
无互联线并联
有功功率
无功功率
稳定性
控制精度
Wireless parallel operation, active power, reactive power, stability, control precision
作者简介
阚加荣，男，1979年生，硕士研究生，研究方向为逆变器并联控制技术。
谢少军，男，1968年生，教授，博士生导师，主要从事功率电子变换技术等方面的研究。
